http://www.aviewoncities.com/gallery/bridges.htm

This is the Sydney Harbor Bridge At Night, It Took Them 9 years to build it, it is one of the longest bridges in the world the length it 1,150m.

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http://bridgepros.com/projects/BayonneBridge/Bayonne.htm

This is The Bayonne Bridge It was open on November 15, 1931&  design by Othmar Ammann. The bridge links Bayonne, New Jersey and Staten Island, New York. It has 4 traffic lanes.

http://www.aviewoncities.com/berlin/oberbaumbrucke.htm

This is the Oberbaumbrucke Bridge located In Berlin. it was modified in 1879 to accommodate heavier traffic and became the longest bridge in Berlin, at 154 meters (505 feet).

http://en.wikipedia.org/wiki/File:Heatpipe_tunnel_copenhagen_2009.jpg

Picture from the tunnel between Rigshospitalet (National Hospital) in Copenhagen and Amager Powerplant in Amager. The tunnel transfers heated water and steam for the city

http://en.wikipedia.org/wiki/File:A_crossover_on_the_south_side_of_Zhongxiao_Xinsheng_Station.JPG

A crossover on the south side of Zhongxiao Xinsheng Station on the Xinzhuang Line of Taipei Metro.

http://en.wikipedia.org/wiki/File:Hill_60_illowra_battery_port_kembla.jpg

Illowra Battery was an Australian Army coastal battery at Port Kembla New South Wales,Australiaduring World War II It was also known as Hill 60 Battery